Roll grinding device



Sept. 8, 1953 c. F. SCHNUCK' ROLL GRINDING DEVICE 2 Sheets-Sheet. 1

Filed June 28, 1950 Patented Sept. 8, 1953 UNITED STATES.PATENT OFFICE Farrel-Birmingham Company, Incorporated Ansonia, Conn., a corporation of Connecticut Application June 28, 1950, Serial No. 170,893

7 Claims.

This invention relates to improvements in roll grinding devices and more particularly in devices for finishing or shaping of rolls used in calenders or similar apparatus where a pair of cooperating rolls are employed through which material is passed to be delivered therefrom in sheet form.

In many instances the surface of such rolls must be maintained in smooth condition and also the rolls must be trued up from time to time after periods of use. It is, of course, somewhat laborious to have to remove the rolls from the roll stands in order that this be done, and it is, therefore, advantageous to provide a device by the use of which the rolls may be ground and polished while in place without the necessity of removing them from the stands in which they operate.

It is contemplated by the present invention to provide a device by which the rolls may be ground while in place, the device comprising a frame or frames to be mounted adjacent the rolls, the frames being constructed to support grinding stones in contact with the surfaces of the rolls and to be adjustable toward and from the rolls so as to make the proper contact therewith. The rolls are rotated in contact with the grinding stones and, thus, the grinding operation is performed, the stones being traversed over the length of the roll during the operation.

It has been ascertained that the stones which are usually held in holders or keepers must be set at a proper angle or rake when bearing against the rolls to be ground or they have a tendency to load up or glaze over and frequently produce scratches on the surface of the roll. It has been the custom in some instances for the stones to be set in sockets or recesses in the holders or frames and shims or fillers of some kind are employed to set the stones at the proper angle as determined by observation and skill of the operator. This would, of course, involve considerable time, particularly in cases where it was necessary to change the angle for one or another reason which required the re-shimming of the stones until the best position thereof was obtained.

In the present instance, I employ a frame or support provided with a seat of arcuate shape in Which is mounted a carrier or holder for the stone of complemental shape so that this holder or carrier may be rotated upon its arcuate seat in the frame and, thus, change the angle or seating of the stone carried by the holder. Clamping means are provided for clamping the stones in place after'an adjustment has been made and as will be apparent as the description proceeds a quick and speedy adjustment may be made merely by loosening the clamping means, tapping the stone to the proper position, and again tightening the clamping means to hold the stone in place. Thus, the operator may make a quick adjustment of the angle of the stones in much less time than was required by a shimming operation.

One object of the present invention is to provide a new and improved device for grinding or polishing the surfaces of rolls of calenders or the like.

Another object of theinvention is to provide a roll grinder or polisher which may be applied to the rolls of a calender or like machine with out removing the rolls from the stands or frames in which they are mounted.

Still another object of the invention is to provide a device for grinding or polishing rolls, the device comprising frames in which the grinding stones are so mounted that adjustment of the stones may be readily and easily effected while at the same time the stones or abrasive members will be held securely in place.

To these and other ends the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. l is a front elevational view of a'roll grinding device embodying my invention, the device being applied to a pair of cooperating rolls;

Fig. 2 is an enlarged sectional view on line 2--2 of Fig. 1;

V Fig. 3 is a view taken on line 3-3 of Fig. i;

Fig. 4 is a sectional view through one of the supporting frame members taken on line 4-! of Fig. 1;

Fig. 5 is a sectional View on line 55 of Fig. 4; Fig. 6 is a sectional view on line 6-6 of Fig. 4; and Fig. 7 is a sectional view on line l-l of Fig. 4.

To illustrate a preferred embodiment of my in vention, I have shown in Fig. 1 of the drawings a pair of cooperating rolls I0 and II supported at their ends in roll stands I2 and 13 of any conventional form. These rolls may be any pair of conventional rolls, such as those used in calenders for example.

My improved grinding device comprises a pair of supporting frames [5 and I6 shown more especially in Fig. 2, these frames being connected by a reach rod I! which is provided with a relatively fiat central portion I8 disposed between the rolls as shown in Fig. 2 so that the rod passes between the rolls from one face thereof to the opposite face and carries the frame members 15 or is on its ends.

The frame members [5 and I6 are identical and the description of one thereof, as shown in Fig. 4, will suffice for both. As shown, each is of hollow form and is provided with an opening l9 at its forward side for the reception of a sleeve 20 rotata'bly mounted on the reach rod H. The inner end of this sleeve is threaded, as shown at 21, to threadedly receive a nose block 22 made of low friction material, which block is designed to be set against the surface of the rolls to steady the supporting frame when the device is in opera tion.

The rear end of the sleeve 23 is provided with an enlarged portion 23, the forward face of which bears against shoulders or lugs 24 (Fig. '7) provided in the supporting frame member I5, while the rear end of the enlarged portion 23 bears against a cap 25 secured to the frame member by bolts 23. Thus, as the enlarged portion 23 is confined between the shoulders 24 and the cap 25, the sleeve will be held against longitudinal movement, but permitted to rotate so as to adjust the nose blocks 22. Access to the portion 23 of the sleeve may be had through an opening 27 in the frame member [5 so that a tool may be inserted in one or the other of the openings 28 in the portion 23 to rotate the sleeve and, thus, adjust the nose blocks.

As shown in Fig. 6, a set screw 36 is threaded into the cap 25, the end 3| of this screw entering a longitudinal slot 32 in the reach rod if so as to prevent rotation of this rod with respect to the frame member. A nut 33 is threaded upon the end of the reach rod and bears against the cap 25 so as to adjust the frame member together with the sleeve 20 and nose block 22 to- I ward and from the rolls. With this construction the nose blocks may be adjusted relatively to the frame members which carry the grinding stones and the frame members and grinding stones may be adjusted together with the nose blocks toward and from the rolls.

Each of the frames I5 and I6 is provided with a pair of arcuate seats or cradles 35, one at the upper side and another at the lower side thereof, these seats being provided at their intermediate portions with depressed guideways 36 to slidably receive a projecting rib 3'! on the rear face of a keeper or holder 33 of one of the grinding stones 39 (Fig. 5). Each of the holders 38 is provided with a recess it in which the stone is received so that it will project from the holder and the stone may be secured in place by means of a set screw 4! which bears against a clamping plate 42. The centers about which the seats 35 are described are substantially at the center of the stones 39 so that the latter are adjusted about an axis passing through the stones and substantially parallel to the axes of the rolls.

As the seats 35 are of arcuate shape and the abutting face of each of the holders 38 is of the same shape, it will be seen that the holders may be rotated upon their seats and thus change the angle of the grinding stones 39 with respect to the surface of the rolls. In order to secure the keepers or holders 38 in any desired position, clamping bolts 44 extend through the walls of the frame members, these clamping bolts being provided with nuts 45 so that by tightening the nuts thereon the walls of the frame members upon each side of the guideway 36 may be drawn 4 together so as to clamp these walls upon the guide rib 3! and hold the keeper fixed in any adjusted position. The frame members are slotted at 46 to permit this action.

With the above construction, it wil1 be seen that it is only necessary to ease off the nuts 45 slightly and, thus, release the guide rib 31, whereupon the keepers or holders 33 may be adjusted or rotated upon their seats 35 so as to give the grinding surface of the stones 39 the desired .angle. As illustrated in Fig. 2, the frame l5 at one side of the device is provided with grinding stones 33, while the keepers or holders 38 in the frame H5 at the other face of the rolls may be merely-provided with steadying blocks 50 of some low friction material to steady the stones and hold them against the surface of the rolls. It will, of course, be understood that if it is desired to grind only one roll, only one stone may be employed while it will also be obvious that stones may be employed in both of the frame members to grind both rolls if desired. The central portion 58 of the reach rod I1 is flattened so as to avoid too great separation of the rolls during the grinding operation.

While I have shown and described some preferred embodiments of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the claims.

What I claim is:

1. In a roll grinding or polishing device, a pair of frames adapted to be positioned one at each side of the bite between a pair of cooperating rolls, a grinding stone secured in one of said frames to engage one of the rolls, a member passing between the rolls and secured to said frames to connect them together, a sleeve rotatably mounted on said member, and extending into said one frame, a nose block mounted on said sleeve, said sleeve and nose block having interengaging screw threads providing adjustment of the nose block along the sleeve, and means preventing longitudinal movement of the sleeve with respect to the associated frame.

2. In a roll grinding or polishing device, a pair of frames adapted to be positioned one at each side of the bite between a pair of cooperating rolls, a grinding stone secured in one of said frames, a member passing between the rolls and connected to said frames to hold them in position, a sleeve rotatably mounted on said member and rotatably supported in one of said frames, a nose block threadedly mounted on said sleeve for adjustment therealong in response to the rotation of said sleeve, and cooperating engaging means carried by said sleeve and frame for preventing longitudinal movement of the sleeve with respect to the frame.

3. In a roll grinding or polishing device, a pair of frame members adapted to be positioned one at each side of the bight between a pair of cooperating rolls, a reach member passing between the rolls and connected to both said frames to hold them in position adjacent the surface of a roll to be ground, one frame having an outwardly opening arcuate seat therein, a grinding stone holder of a shape complementary to said seat and rotatably mounted therein, and a grinding stone seated in a recess in said holder, the axis of said seat passing through said stone, said seat having a depressed arcuate guideway intermediate its ends, and said holder having a rib snugly received in said guideway.

4. In a roll grinding or polishing device, a pair of frame members adapted to be positioned one at each side of the bight between a pair of cooperating rolls, a reach member passing between the rolls and connected to both said frames to hold them in position adjacent the surface of a roll to be ground, one frame having an outwardly opening arcuate seat therein, a grinding stone holder of a shape complementary to said seat and rotatably mounted therein, and a grinding stone seated in a recess in said holder, the axis of said seat passing through said stone, said seat having a depressed arouate guideway intermediate its ends, said holder having a rib snugly received in said guideway, and means engaging the walls of said guideway to clamp the walls of said guideway against said rib.

5. A roll grinding or polishing device comprising a pair of frames adapted to be positioned one at each side of the bite between a pair of cooperating rolls, a member extending between said frames and secured to both thereof to hold them in operative position relatively to the rolls, a grinding stone holder for rotative adjustment about an axis substantially parallel to that of the rolls, said h01der having a recess to receive a grinding stone, and said axis passing through a stone mounted in said recess, and cooperating means on said holder and frame for securing said holder to the frame in adjusted position.

6. A roll grinding or polishing device comprising a pair of frames adapted to be positioned one at each side of the bite between a pair of cooperating rolls, a grinding stone secured in one of said frames to contact the surface of one of the rolls, a member passing between the rolls and connected at its ends to said frames to hold them in position and prevent a separating movement thereof, a nose block supported on said member between one of the frames and the roll bite to bear upon the surface of the rolls when the stone is contacting the roll surface, and means on said member and nose block for adjusting said nose block along said member relatively to the adjacent frame.

7. A roll grinding or polishing device compris ing a pair of frames adapted to be positioned one at each side of the bite between a pair of coopcrating rolls, a grinding stone secured in one of said frames to contact the surface of one of the rolls, a member passing between the rolls and connected at its ends to said frames to hold them in position and prevent a separating movement thereof, a nose block supported on said member between one of the frames and the roll bite to bear upon the surface of the rolls when the stone is contacting the roll surface, means on said member and nose block for adjusting said nose block along said member relatively to the adjacent frame, and each of said frames being adjustably connected to said member for movement. toward and from the roll bite.

CARL F. SCHNUCK.

References Cited in the file of this patentv UNITED STATES PATENTS Number Name Date 292,927 Lipe Feb. 5, 1884- 1,006,377 Bott Oct. 17, 1911 1,250,939 Anthony Dec. 25, 1917' 1,504,458 Wahlert Aug. 12, 19242 1,614,097 Bell Jan. 11, 1927' 1,716,129 Hazelton June 4, 1929 1,977,001 Leach Oct. 16, 1934 2,254,508 Barrett Sept. 2, 1941 2,461,459 Wilkes Feb. 8. 1949 

